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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 2.4L - DTC P0628 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Inspection/Maintenance System Check >> Circuit/System Testing

Circuit/System Testing

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    NOTE:

    Many DTC related repairs will instruct the technician to clear the DTC information. Clearing the DTC will reset the Inspection/Maintenance System Status or Data indicators to NO. Performing the I/M Complete System Set Procedure will set each of the I/M System Status indicators to YES.

  1. Verify no I/M DTCs are present.
    • If no I/M DTCs are set 
  2. Review applicable service bulletins for software updates that would prevent the I/M System Status tests from completing.
    • If no repair is required 
  3. Observe the Inspection/Maintenance System Status or Data indicators.
    • If no Inspection/Maintenance System Status or Data indicators report NO 
  4. All OK.